“…A number of studies have also demonstrated the relation of infant self-produced locomotor experience (through crawling or experience in an infant walker) with a broad array of psychological phenomena, including cognitive development (Bertenthal, Campos, & Barrett 1984;Bai & Bertenthal, 1992), development of spatial search (Kermoian & Campos, 1988), perceptual development (Higgins, Campos, & Kermoian, 1996), social development (Campos, Kermoian, & Zumbahlen, 1992), emotional development (Campos, Bertenthal, & Kermoian, 1992), and neurophysiological processes (Bell & Fox, 1996). Experimental studies have demonstrated that some of the above relations are caused by locomotor experience, specifically by randomly assigning prelocomotor infants to a condition in which infants control a powered-mobility device and others do not (Dahl et al, in press;Uchiyama et al, 2008). In each of these studies, the acquisition of a new motoric skill was associated with development in a broad range of psychological areas.…”